Culloch



H. W. McCULLOCH,

HINGED BRAKE BAND.

APPLICATION FILED SEPT.15.19I9.

1,371,91 6. Patented Mar. 15, 1921.

anvawtoz PATENT OFFICE.

HAROLD WEED MOCULLOCH. OF NEW YORK. N. Y.

HIHGED BRAKE-BAND.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed September 15, 1919. Serial No. 323,786.

To all whom it may concern:

Be it known that I, HAROLD WEED Mc- CULLooH, a citizen of the United States, residing at the city of New York, county of Bronx, and State of New York, have invented new and useful Improvements in Hinged Brake-Bands, of which the follow- 111%{18 a specification.

y invention relates to brake bands of the type which is a plied to the periphery of a drum and has or an object to increase the gripping efliciency thereof.

A further object of my invention is to provide a brake band which reduces to a minimum when it does not entirely eliminate the objectionable chattering incident to the use of similar brake bands.

In its broad aspect my improved band structurally conforms to a curved steel band hinged at appromixately its middle portlon having the usual means for applying the clamping or drawing action to bring its ends to ther.

he accompanying drawings illustrate a preferred embodiment of my invention, of which- Figure 1 is a side view of the band applied to a drum, and

Fig. 2 is a partial plan view of the hinge portion of the band as viewed from below.

Having reference to the drawings, the numeral 1 represents the band of a preferred embodiment of my invention in its entirety as applied to the usual drum 5. The band 1 has the usual lips or lugs 2 at its respective ends, which supply the means for clamping, and is made up of two similar members 3, connected by means of the bin e 4.

pen the inner surface of the band is the replaceable lining 6 which is securely attached to the members 3 preferably by the usual rivets 7, the lining comprising a single unitary strip which provides the maximum braking area and the other advantages of a single continuous brake band, but at the same time the articulated band avoids the chatterin and other objectionable features of a sing e continuous band.

In the form illustrated I have shown a single hinge joint of a simple type having the usual pintle joining the two leaves comprising the hinge. However the basic feature of my invention does not lie in the number of such joints nor in the particular method of connecting the several band members, for any type of hinge joint of suflicient tensile strength will fulfil this function of my improved structure.

It is nevertheless pointed out that the simple hinge construction completely supplies many of the requirements of my invention and is therefore deemed suflicient to illustrate the essentials thereof.

Thus my improved form of brake band with the type of bin e illustrated may be opened su ciently wi e to go laterally over the drum without straining or springing the parts, wherein serious injury might be caused. Furthermore a band with the simple hinge referred to while having the advantages described in assembling the brake, also retains all the advantages of a one piece band in the process of constricting the band upon the drum in applying the brake.

In short the hinge joint not only unites the members as securely and firmly as if in the single piece construction, but permits opening up and spreading to the fullest extent required.

The use and operation of my improved band is effected in the same manner as all bands of its general type, its advantages lying chiefly in its efficiency when used in the ordinary manner. Thus the articulated construction permits the band to fit snugly over the drum in the process of constrictron, not only obviating the tendency to chattering, but increasing the frictional contact between the band surface and the drum.

I shall not undertake to explain all the underlyin causes contributing to the increased e ciency of a band having one or more hinged joints with a one piece strip of lining. It will, however, be apparent upon examining the action of a single band made of spring steel for example, in comparison wlth the constricting action of a band having a linked construction as in a chain grip, that the latter will bear uniformly at all points of the peripheral contact upon the drum, while the former, or single band construction, may engage onl at certain points on the surface of the ban I Having described my invention. what I claim is:

1. A vehicle transmission brake element comprising an articulated band, a lining strip secured thereto, and clamping lugs carried by the free ends of the band, at least one of the lugs being removably connected to the band.

2. A vehicle transmission brake element comprising a band of two parts hinged together, a substantially continuous strip secured to both of the hinged parts, and clamping lugs carried by the free ends of the band, at least one of which lugs is 10 readily removable from the band.

In testimony whereof I have hereunto set my hand. 7

HAROLD WEED MGCULLOCH. 

